Chip-A-Tex - The Chip-A-Tex waterproof membrane system is breathable. Water is locked out of the boot by the membrane shield but air passes through from the foot for maximum comfort.

3M Thinsulate Ultra Insulation - Thinsulate Ultra insulation is loftier and thicker than original Thinsulate insulation for even greater warmth and comfort, yet still thin enough to allow complete freedom of movement. A mid-loft insulation, it is designed for some of the harshest conditions on earth and retains insulating value in damp conditions.